US5611754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for internal combustion engines
Assignee: Honda Motor Co Ltd
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Filing: 1995-06-06
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Granted: 1997-03-18
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Expires: 2015-06-06
Abstract
Abstract A control system for an internal combustion engine adjusts at least one predetermined control parameter such that a rate of combustion variation calculated based on a detected state of combustion of the engine becomes equal to a desired rate of combustion variation, which is dependent on operating conditions of the engine. A state of engagement of a lock-up clutch connected to the engine and a slip ratio of a torque converter connected to the same are detected. The desired rate of combustion variation is corrected in dependence on at least one of the detected state of engagement of the lock-up clutch and the detected slip ratio of the torque converter.
Inventors
- 👤 Takashi Haga
- 👤 Hidezo Umiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:06
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1497; F02D35/00; F02D35/02; F02D41/021; F02D41/0215; F02D41/022; F02D41/1401; F02D41/1404; F02D2200/00; F02D2200/70; F02D2200/702; F02D2400/00; F02D2400/12; F02D35/021; F16; F16H; F16H59/00; F16H59/36; F16H59/46; F16H2059/465; F16H2059/467; F16H61/00; F16H61/14; F16H63/00; F16H63/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
211 words
In a control system for an internal combustion engine to which are connected a lock-up clutch and a torque converter, including combustion state-detecting means for detecting a state of combustion of said engine, combustion variation rate-calculating means for calculating a rate of combustion variation, based on said state of combustion of said engine detected by said combustion state-detecting means while said engine is in a combustive state, operating condition-detecting means for detecting operating conditions of said engine, and control parameter-adjusting means for adjusting at least one predetermined control parameter such that said rate of combustion variation calculated by said combustion variation rate-calculating means becomes equal to a desired rate of combustion variation dependent on said operating conditions of said engine detected by said operating condition-detecting means while said engine is in said combustive state, the improvement comprising: engagement state-detecting means for detecting a state of engagement of said lock-up clutch; slip ratio-detecting means for detecting a slip ratio of said torque converter; and desired combustion variation rate-correcting means for correcting said desired rate of combustion variation in dependence on at least one of said state of engagement of said lock-up clutch detected by said engagement state-detecting means and said slip ratio of said torque converter detected by said slip-ratio detecting means.
Claim 2
Dependent Claim
211 words
In a control system for an internal combustion engine to which are connected a lock-up clutch and a torque converter, including combustion state-detecting means for detecting a state of combustion of said engine, combustion variation rate-calculating means for calculating a rate of combustion variation, based on said state of combustion of said engine detected by said combustion state-detecting means while said engine is in a combustive state, operating condition-detecting means for detecting operating conditions of said engine, and control parameter-adjusting means for adjusting at least one predetermined control parameter such that said rate of combustion variation calculated by said combustion variation rate-calculating means becomes equal to a desired rate of combustion variation dependent on said operating conditions of said engine detected by said operating condition-detecting means while said engine is in said combustive state, the improvement comprising: engagement state-detecting means for detecting a state of engagement of said lock-up clutch; slip ratio-detecting means for detecting a slip ratio of said torque converter; and desired combustion variation rate-correcting means for correcting said desired rate of combustion variation in dependence on at least one of said state of engagement of said lock-up clutch detected by said engagement state-detecting means and said slip ratio of said torque converter detected by said slip-ratio detecting means.
Claim 3
Dependent Claim
36 words
A control system according to claim 1, wherein said desired combustion variation rate-correcting means corrects said desired rate of combustion variation to a smaller value as said state of engagement of said lock-up clutch is tighter.
Claim 4
Dependent Claim
36 words
A control system according to claim 1 or 2, wherein said desired combustion variation rate-correcting means corrects said desired rate of combustion variation to a larger value as said slip ratio of said torque is larger.
Claim 5
Dependent Claim
31 words
A control system according to claim 1, wherein said at least one predetermined control parameter comprises air-fuel ratio of a mixture supplied to said engine, and ignition timing of said engine.
Claim 6
Dependent Claim
224 words
In a control system for an internal combustion engine to which are connected a lock-up clutch and a torque converter, including combustion state-detecting means for detecting a state of combustion of said engine, combustion variation rate-calculating means for calculating a rate of combustion variation, based on said state of combustion of said engine detected by said combustion state-detecting means, operating condition-detecting means for detecting operating conditions of said engine, and control parameter-adjusting means for adjusting at least one predetermined control parameter such that said rate of combustion variation calculated by said combustion variation rate-calculating means becomes equal to a desired rate of combustion variation dependent on said operating conditions of said engine detected by said operating condition-detecting means, the improvement comprising: engagement state-detecting means for detecting a state of engagement of said lock-up clutch; slip ratio-detecting means for detecting a slip ratio of said torque converter; and desired combustion variation rate-correcting means for correcting said desired rate of combustion variation in dependence on at least one of said state of engagement of said lock-up clutch detected by said engagement state-detecting means and said slip ratio of said torque converter detected by said slip-ratio detecting means, wherein said desired combustion variation rate-correcting means corrects said desired rate of combustion variation to a smaller value as said state of engagement of said lock-up clutch is tighter.
Claim 7
Dependent Claim
224 words
In a control system for an internal combustion engine to which are connected a lock-up clutch and a torque converter, including combustion state-detecting means for detecting a state of combustion of said engine, combustion variation rate-calculating means for calculating a rate of combustion variation, based on said state of combustion of said engine detected by said combustion state-detecting means, operating condition-detecting means for detecting operating conditions of said engine, and control parameter-adjusting means for adjusting at least one predetermined control parameter such that said rate of combustion variation calculated by said combustion variation rate-calculating means becomes equal to a desired rate of combustion variation dependent on said operating conditions of said engine detected by said operating condition-detecting means, the improvement comprising: engagement state-detecting means for detecting a state of engagement of said lock-up clutch; slip ratio-detecting means for detecting a slip ratio of said torque converter; and desired combustion variation rate-correcting means for correcting said desired rate of combustion variation in dependence on at least one of said state of engagement of said lock-up clutch detected by said engagement state-detecting means and said slip ratio of said torque converter detected by said slip-ratio detecting means, wherein said desired combustion variation rate-correcting means corrects said desired rate of combustion variation to a smaller value as said state of engagement of said lock-up clutch is tighter.
Claim 8
Dependent Claim
34 words
A control system according to claim 5, wherein said desired combustion variation rate-correcting means corrects said desired rate of combustion variation to a larger value as said slip ratio of said torque is larger.
Claim 9
Dependent Claim
222 words
In a control system for an internal combustion engine to which are connected a lock-up clutch and a torque converter, including combustion state-detecting means for detecting a state of combustion of said engine, combustion variation rate-calculating means for calculating a rate of combustion variation, based on said state of combustion of said engine detected by said combustion state-detecting means, operating condition-detecting means for detecting operating conditions of said engine, and control parameter-adjusting means for adjusting at least one predetermined control parameter such that said rate of combustion variation calculated by said combustion variation rate-calculating means becomes equal to a desired rate of combustion variation dependent on said operating conditions of said engine detected by said operating condition-detecting means, the improvement comprising: engagement state-detecting means for detecting a state of engagement of said lock-up clutch; slip ratio-detecting means for detecting a slip ratio of said torque converter; and desired combustion variation rate-correcting means for correcting said desired rate of combustion variation in dependence on at least one of said state of engagement of said lock-up clutch detected by said engagement state-detecting means and said slip ratio of said torque converter detected by said slip-ratio detecting means, wherein said desired combustion variation rate-correcting means corrects said desired rate of combustion variation to a larger value as said slip ratio of said torque is larger.
Claim 10
Dependent Claim
222 words
In a control system for an internal combustion engine to which are connected a lock-up clutch and a torque converter, including combustion state-detecting means for detecting a state of combustion of said engine, combustion variation rate-calculating means for calculating a rate of combustion variation, based on said state of combustion of said engine detected by said combustion state-detecting means, operating condition-detecting means for detecting operating conditions of said engine, and control parameter-adjusting means for adjusting at least one predetermined control parameter such that said rate of combustion variation calculated by said combustion variation rate-calculating means becomes equal to a desired rate of combustion variation dependent on said operating conditions of said engine detected by said operating condition-detecting means, the improvement comprising: engagement state-detecting means for detecting a state of engagement of said lock-up clutch; slip ratio-detecting means for detecting a slip ratio of said torque converter; and desired combustion variation rate-correcting means for correcting said desired rate of combustion variation in dependence on at least one of said state of engagement of said lock-up clutch detected by said engagement state-detecting means and said slip ratio of said torque converter detected by said slip-ratio detecting means, wherein said desired combustion variation rate-correcting means corrects said desired rate of combustion variation to a larger value as said slip ratio of said torque is larger.
Claim 11
Dependent Claim
219 words
In a control system for an internal combustion engine to which are connected a lock-up clutch and a torque converter, including combustion state-detecting means for detecting a state of combustion of said engine, combustion variation rate-calculating means for calculating a rate of combustion variation, based on said state of combustion of said engine detected by said combustion state-detecting means, operating condition-detecting means for detecting operating conditions of said engine, and control parameter-adjusting means for adjusting at least one predetermined control parameter such that said rate of combustion variation calculated by said combustion variation rate-calculating means becomes equal to a desired rate of combustion variation dependent on said operating conditions of said engine detected by said operating condition-detecting means, the improvement comprising: engagement state-detecting means for detecting a state of engagement of said lock-up clutch; slip ratio-detecting means for detecting a slip ratio of said torque converter; and desired combustion variation rate-correcting means for correcting said desired rate of combustion variation in dependence on at least one of said state of engagement of said lock-up clutch detected by said engagement state-detecting means and said slip ratio of said torque converter detected by said slip-ratio detecting means, wherein said at least one predetermined control parameter comprises air-fuel ratio of a mixture supplied to said engine, and ignition timing of said engine.
Claim 12
Dependent Claim
219 words
In a control system for an internal combustion engine to which are connected a lock-up clutch and a torque converter, including combustion state-detecting means for detecting a state of combustion of said engine, combustion variation rate-calculating means for calculating a rate of combustion variation, based on said state of combustion of said engine detected by said combustion state-detecting means, operating condition-detecting means for detecting operating conditions of said engine, and control parameter-adjusting means for adjusting at least one predetermined control parameter such that said rate of combustion variation calculated by said combustion variation rate-calculating means becomes equal to a desired rate of combustion variation dependent on said operating conditions of said engine detected by said operating condition-detecting means, the improvement comprising: engagement state-detecting means for detecting a state of engagement of said lock-up clutch; slip ratio-detecting means for detecting a slip ratio of said torque converter; and desired combustion variation rate-correcting means for correcting said desired rate of combustion variation in dependence on at least one of said state of engagement of said lock-up clutch detected by said engagement state-detecting means and said slip ratio of said torque converter detected by said slip-ratio detecting means, wherein said at least one predetermined control parameter comprises air-fuel ratio of a mixture supplied to said engine, and ignition timing of said engine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-17 | 2000-09-16 | 2001-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-17 | 2004-09-16 | 2005-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-17 | 2008-09-16 | 2009-03-18 | $7700.00 | Window Closed / Lapsed |